820-3332 no picture

bighead

New member
Hi,

I got this macbook with cracked LCD. I changed the LCD, no backlight and no screen, and no picture on external display.

No liquid damage for sure. I checked:

L8930
L8960
L8360
L8310
nothing on them.
GPU is ice cold.

I can't take this to Apple. PO ripped off the screw sleeves of the board.
I don't have P3V3GPU_EN. This could be a bad GMUX?

Thanks!
 

bighead

New member
Update:

Checked U9100 GMUX.
I've PP3V3_S0_DPMUX_UC_R and PP3V3_S3_DPMUX_UC_R too.
So it has all the powers rails.

Y9100 is missing. Looks like it does not need clock signal.
 

dukefawks

Administrator
The question is was this working before you did the LCD. The other question is did you remove the board before you did the LCD?
 

bighead

New member
Yes, it does. It chimes and boots into OS X. Just nothing on the screen.
I can set the volume up and down. I also can change the keyboard backlight.
Just no picture, I tried external it shows black screen and after a sec no signal, and then black screen and then no signal.
 

turbo

Member
remove lvds cable then connect with external screen ... and see if there any thing on screen ....
 
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